In this June 12, 1971 file photo, then U.S. President Richard Nixon applauds as his daughter Tricia and her husband Edward Finch Cox, cut a giant wedding cake at the White House. (AP Photo/FILE)

In this photo provided by Genevieve de Manio Photography, Chelsea Clinton and Marc Mezvinsky are seen during their wedding, Saturday, July 31, 2010 in Rhinebeck, N.Y. (AP Photo/Genevieve de Manio)

This May 10, 2008 file photo shows Jenna Bush, daughter of President George W. Bush and first lady Laura Bush, as she exchanges wedding vows with Henry Hager. (AP Photo/The White House/Shealah Craighead, file)

Dwight D. Eisenhower is shown with his bride, Mamie, shortly after their wedding in Denver, Colorado, July 1, 1916. (AP Photo/File)

An archive photo of John F. Kennedy's wedding in the "Political Partners" travelling exhibit being shown at the Richard Nixon Library, Tuesday June 16, 1998, in Yorba Linda, Calif. (AP Photo/Cecil Yates)

The former Susan Ford and her new husband, Charles Vance leave St. Margaret's Episcopal Church, Palm Desert, Calif, after their wedding Feb. 10, 1979. Former President Gerald Ford is visble in upper right background. (AP Photo/Wally Fong)

This undated photo released by Obama for America shows then-Democratic presidential candidate Barack Obama and his bride Michelle Robinson on their wedding day, Oct. 18, 1992, in Chicago, Illinois. (AP Photo/Obama for America)

Mr. and Mrs. E. Clifton Daniel Jr. pose for pictures during their wedding reception, April 21, 1956. Mrs. Daniel Jr. is the former Margaret Truman, daughter of the former President. (AP Photo)

Amy Carter, daughter of former President Jimmy Carter, poses with new husband Jim Wentzel after the two were married in a brief and private ceremony in Plains, Ga. Sunday, Sept. 1, 1996. (AP Photo/Carter family, Charles Plant)

Then-Vice President Gerald Ford, far left, offers congratulations to his son, Michael, at his wedding on Friday, July 5, 1974 in Catonsville, Md. (AP Photo/WAS/Richard Sheinwald)

In these pictures released by the National Park Service, Theodore Roosevelt, right, and his first wife Alice Hathaway Lee are shown in 1880, the year the couple married. (AP Photo/National Park Service, HO)

This is a July 19, 1986 photo of Caroline Kennedy and Edwin Schlossberg on their wedding day in Centerville, Mass. (AP Photo)

Ronald and Nancy Reagan pose with actor William Holden, right, and his wife Ardis Holden, left, in this White House photo of the Reagans' 1952 wedding. (AP Photo/White House/ho)

Former President William Howard Taft at the wedding of his daughter Helen Taft to Frederick Johnson Manning, an instructor in history at Yale University, was celebrated at Murray Bay, Canada, on July 15, 1920. (AP Photo)

President Gerald Ford, right, and his wife Betty Ford are seen on their wedding day, Oct. 15, 1948. (AP Photo/Ladies Home Journal)

Newlyweds Marine Corps Capt. Charles S. Robb and Lynda Bird Johnson pose with their parents in the Yellow Oval Room in the White House in Washington, D.C. on Dec. 9, 1967. (AP Photo)

Luci Johnson poses in her wedding gown in official photo released by the White House Aug. 6, 1966. (AP Photo/ho)

President George H.W. Bush's daughter Dorothy, and Bobby Koch exchanged marriage vows during a 23-minute ceremony in Camp David, Md. Saturday, June 28, 1992. (AP Photo/Courtesy of the White House,David Valdez)